Special procedure to the call of system functions. Most of these functions are of interest only for debug purposes.
| Value% | Function |
| 0 | No testing for program interrupt and setting of the touch variables |
| 1 | Testing for program interrupt and setting of the touch variables |
| 2 | Forced immediate touchscreen-inquiry |
| 3 | Output of all stored strings |
| 4 | Output of the free memory for strings |
| 5 | Forced garbage collection |
| 6 | Normal runtime error messages (with abort) see below |
| 7 | No runtime error messages see below |
| 10 | Start fasttimer |
| 11 | Stop fasttimer |
| 12 | The buttons "Light" und "Off" are queried by OWBasic (Default) |
| 13 | "Light" und "Off" are not queried by OWBasic |
| 14 | AutoPowerOff (power off after a given time of touch screen inactivity) enabled |
| 15 | AutoPowerOff disabled (Default) |